My mom, Theresa Ann Poisson(one of four children), stated that my grandfather, Jerome Poisson (married Catherine Pool-Poisson), moved to Sheboygan, WI from Upper Michigan. She also said that his family was originally from France, moved to Canada and then to Upper Michigan. She feels that there is a strong chance that there may still be relatives in the Upper Michigan Area. I was hoping that maybe someone here would either know something or perhaps have suggestions for other placed to seek information. I am doing this as a gift to her.